Audio frequency power line control system

Details Audio frequency power line control system Audio frequency power line control system

1975-11-20

1977-05-03

Habecker, Thomas B.

Communications: electrical

Systems

Selsyn type

321 34, H04M 1104

Patent

active

040217973

ABSTRACT:
An audio frequency power line carrier control system utilizing an inverter as the carrier control transmitter with the output phase voltages of the inverter fed to a distribution network through a series inductance, a filter circuit and a current transformer in which a starting control is provided which modulates the audio frequency pulses at the beginning of clock pulses for transmitting data using a control signal which is pulse width modulated, modulation being terminated when the pulse width of the control pulse width falls below a predetermined minimum duration thereby permitting small series inductances to be used.

REFERENCES:
patent: 3439338 (1969-04-01), Perry
patent: 3925763 (1975-12-01), Wadhwani
patent: 3942168 (1976-03-01), Whyte

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